#!/usr/bin/python
#-*- coding: utf-8 -*-

import sys
reload(sys)

import os

def disk():
    grains = {}
    disk = os.statvfs('/')
    grains['disk'] = (disk.f_bsize * disk.f_blocks)/1024/1024/1024
    return grains

if __name__ == '__main__':
    print disk()